The rack rail systems for the Dell™ PowerEdge™ R720 and R720xd provide toolless support for
4-post racks with square or unthreaded round mounting holes, including all generations of Dell racks. Compared to the predecessor R710 sliding rails that required the use of adapter brackets, the sliding rails for the R720 and R720xd now offer native support for threaded-hole racks with the new
ReadyRails™ II mounting interface.
The optional cable management arm (CMA) can be mounted on either the left or right side of the sliding rails without the use of tools for fast and easy deployment.
The R720 and R720xd support both sliding rails and static rails. Both rails have a new slim rail design that supports the wide system chassis.
The sliding rails (shown in Figure 14) allow the system to be fully extended out of the rack for service
and are available with or without the optional cable management arm (CMA).
39 PowerEdge R720 and R720xd Technical Guide
The static rails (shown in Figure 15) support a wider variety of racks than the sliding rails, but do not
support serviceability in the rack and are not compatible with the CMA.
One key factor in selecting the proper rails is identifying the type of rack in which they will be installed. Both the sliding rails and the static rails support toolless mounting in 19”-wide, EIA-310-E compliant square hole and unthreaded round-hole 4-post racks. Both also support tooled mounting in threaded hole 4-post racks, but only the static rails, as the more universal solution, support mounting in 2-post (Telco) racks.
Table 23 lists the rack rail systems that the R720 and R720xd support.
System
R720/R720xd
Rail
identifier
B6
B4
Mounting interface
ReadyRails II
ReadyRails
Rail
type
Sliding
Static
Rack types supported
4-post 2-post
Square Round Thread Flush Center
X X
For detailed information about rail dimensions, see the Rack rail specifications section in Appendix A.
For more information on installing the T620 in a rack, see the
Support.Dell.com/Manuals .
Rack Installation Instructions
on
40 PowerEdge R720 and R720xd Technical Guide
